hmm, it's pretty tricky to fix to be honest as obviously there is a lot of pressure around that part. But it may be possible and worth a try? most boards work fine at 12-15psi, but if it's leaking it is best to have it looked at by someone/make sure you take all safety precautions when paddling with it.....ie, stay close to shore/lifejacket etc etc - but a leaking board should not really go back into the water, unless it's a very, very slow leak...